/*
 * Copyright 2004 original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jbfilter.jsp;

import javax.servlet.jsp.JspException;

import org.apache.commons.lang.StringUtils;
import org.jbfilter.core.TruncateUnit;

public class TruncateUnitSupport {
	private String truncateAsString;
	private boolean truncateSet;
	private JbfilterTag jbfilterTag;

	// constructor
	public TruncateUnitSupport(JbfilterTag jbfilterTag) {
		this.jbfilterTag = jbfilterTag;
	}
	
	public void setTruncateAsString(String truncateAsString) {
		this.truncateAsString = truncateAsString;
		truncateSet = true;
	}
	public boolean isTruncateSet() {
		return truncateSet;
	}
	public String getTruncateAsString() {
		return truncateAsString;
	}
	public TruncateUnit getTruncate() throws JspException {
		return getTruncate(null);
	}
	public TruncateUnit getTruncate(String valueForNull) throws JspException {
		if (valueForNull != null) {
			if (valueForNull.equals(truncateAsString)) {
				return null;
			}
		}
		if (StringUtils.isNotBlank(truncateAsString)) {
			return EnumUtils.fromString(
					truncateAsString,
					TruncateUnit.class,
					JbfilterTagAttribute.truncate,
					jbfilterTag);
		} else {
			return null;
		}
	}
}
